Process of forming pipe closures



Oct. 9, 1928. 1,686,562

P. JACKSON PROCESS OF FORMING PIPE CLOSURES Filed June 20, 1927 INVENTOR P Jzcwso/v BY 7mm ATTORNEYS Patented Oct. 9, 1928.

UNITED, squares- A ENT OFFICE. i

PnncY AcKson, or cmcAeo, IIQLINoIs.

' rnocnss or FORMING-[PIPE cnosunns.

Application filed June 20, 1927. Serial No. 200,187."

My invention relates to improvements in process and means for forming pipe closures,

and is especially applicable to pipes. which are used in connection with high pressure steam boilers. 1

The existing laws now 'inioree in many of the States and cities of the United States do not permit the use of autogenous orielectric fusion welding in the construction Of quickly and cheaply made.

Other ob ects and advantages Wlll appear in the following specification, and the novel f features of the invention will be. particularly pointed out in the appended claims.' My invention is illustrated in the accom panying drawings, forming part of this application, in which Figure 1 shows a portion of a pipe and an end plug, the pipe being shown partly in section, Figure 2 is a section through .a portion-of the pipe and end plug, showing the first step of the process,

Figure 3 is a similar view showing the second step,

sure steam boilers and of any desirable shape,

such as that shown in Figure 5 at lor that shown in Figure 6 at 1.' The end of the pipe 1 is cutoff square.

At 2 I have shown an plu which adapted to enter the open-end of the pipe. This plug is provided Wltll a circumferential groove 3 and has a flange 4 on one side bending step, a welding flux 8 is placed be- ,piece by this process, and that in addition.

Figure 41s a sectional viewshowing the of the groove, this flange having aj curved portion 5 which meets the inner face 6 of the flange, thus forming a thin edge 7.

The first step in the process of forming a closureis to heat the end of the pipe 1 tea red heat and'then by the use of a suitable flanging device to force the end portion 1 {into the. groove 3 ofthe' closure plug, as

shown in Figure 2. I g The end of the pipe, with the attached j plug 2 is again heated and the flange 4 is bent over against the outer portion ofthe pipe 1, as shown in Figure 3. During this tween the flange4 and the pipe.' s

The pipe and the attached plug are now brought to a welding heat in a suitable forge or furnace andthe flange 4 is welded to the end-of the pipe by any suitablemeans and the weld finished in the form shownin Figure 4.

It will be seen that the pipe,and the 010- sure plug are virtually made one integral to the integral portion that part 0 f the pipe in the groove serves as an auxiliary pressure resisting means, although it is not .Welded at, the bottom of the groove to the plug, and the closure. thus formed will stand the most severe tests. The process can be quicklycarried out at a relatively low cost. s

I claim: f i J p 1. The herein describedprocess of form ing vclosures for pipes, which consists in placing in oneiend of the pipe a closure plug having a circumferential groove and an outwardly extending flange havinga curved portion, bending the end of the pipe into the groove, bending the flange over the bent pipe end, and, welding the bent flange to the bent pipe end. I

2 The herein described process of. forming closures for pipes, which consists in placing 'in a heated pipe end a closure p1ug having a circumferential groove and an out-' wardly extending flange having a curved portion, bending the heatedend of the pipe into the groove to grip the plug, heating the pipe and,the plug,-bending the flange of the 0 plug over the pipe end and reheating the pipe end and plug to a welding heat, and

welding the bent flange to the bent pipe end. pipe and the plug, placing a Welding flux 3. The herein described process of formbetween the flange and the heaited pipe end, 10 ing closures for pipes, which consists inplacbending the flange of the plug over the pipe ing in a heated pipe end a' closure plug havend and reheating the pipe end and plug to 5 ing a circumferential groove and an outa Welding heat, and Welding the bentflange wardly extending flange having a curved to the bent pipe end. portion, bending the heated end of the pipe 1 into the groove to grip the plug, heating the i PERCY JACKSON. 

